<template>
  <section class="loginContainer">
    <div class="loginInner">
      <div class="login_header">
        <h2 class="login_logo">硅谷外卖</h2>
        <div class="login_header_title">
          <a href="javascript:;" @click="isUserNameLogin=false" :class="{on: !isUserNameLogin}">短信登录</a>
          <a href="javascript:;" @click="isUserNameLogin=true"  :class="{on: isUserNameLogin}">密码登录</a>
        </div>
      </div>
      <div class="login_content">
        <form>
          <!-- 手机号登录 -->

          <div :class="{on: !isUserNameLogin}">
            <section class="login_message">
              <input name="phone" v-validate="'required|phone'" v-model="phone" type="tel" maxlength="11" placeholder="手机号">
              <span style="color: red;" v-show="errors.has('phone')">{{ errors.first('phone') }}</span>
              <!-- rightPhoneNumber 为true的时候导致前边的条件为fals，导致后边的条件失效-->
              <!--:disabled="!rightPhoneNumber && countDownTime === 0"-->
              <button
                  @click.prevent="getCode"
                  :disabled="!rightPhoneNumber || countDownTime > 0"
                  class="get_verification "
                  :class="{rightPhone: rightPhoneNumber}"
              >{{countDownTime?`${countDownTime}s后可以重新获取`:'获取验证码'}}</button>
            </section>
            <section class="login_verification">
              <input v-model="code" name="code" v-validate="'required|code'" type="tel" maxlength="8" placeholder="验证码">
              <span style="color: red;" v-show="errors.has('code')">{{ errors.first('code') }}</span>

            </section>
            <section class="login_hint">
              温馨提示：未注册硅谷外卖帐号的手机号，登录时将自动注册，且代表已同意
              <a href="javascript:;">《用户服务协议》</a>
            </section>
          </div>
          <!-- 用户名登录 -->

          <div :class="{on: isUserNameLogin}">
            <section>
              <section class="login_message">
                <input v-model="username" name="username" v-validate="'required'" type="tel" maxlength="11" placeholder="手机/邮箱/用户名">
                <span style="color: red;" v-show="errors.has('username')">{{ errors.first('username') }}</span>

              </section>
              <section class="login_verification">
                <input v-model="pwd" name="pwd" v-validate="'required'" :type="isShowPwd?'tel':'password'" maxlength="8" placeholder="密码">
                <span style="color: red;" v-show="errors.has('pwd')">{{ errors.first('pwd') }}</span>

                <div class="switch_button " :class="isShowPwd?'on':'off'" @click="isShowPwd=!isShowPwd">
                  <div class="switch_circle " :class="{right: isShowPwd}"></div>
                  <span class="switch_text">{{isShowPwd?'abc':'...'}}</span>
                </div>
              </section>
              <section class="login_message">
                <input v-model="captcha" name="captcha" v-validate="'required'" type="text" maxlength="11" placeholder="验证码">
                <span style="color: red;" v-show="errors.has('captcha')">{{ errors.first('captcha') }}</span>

                <img ref="captcha" @click="toggleCaptcha" class="get_verification" src="http://localhost:4000/captcha" alt="captcha">
              </section>
            </section>
          </div>
          <button class="login_submit" @click.prevent="login">{{$t('login')}}</button>
        </form>
        <a href="javascript:;" class="about_us">关于我们</a>
      </div>
      <a href="javascript:" class="go_back">
        <i class="iconfont icon-jiantouzuo"></i>
      </a>
    </div>
    <div class="languageContainer">
      <mt-button type="primary" @click="toggleLanguage('Chinese')">中文</mt-button>
      <mt-button type="primary" @click="toggleLanguage('English')">英文</mt-button>
      <mt-button type="primary" @click="toggleLanguage('Japanese')">日文</mt-button>
    </div>
  </section>
</template>

<script>
  import {sendCode} from '../../api'
  export default {
    data(){
      return {
        isUserNameLogin: false, // 是否是用户名登录，默认为false
        isShowPwd: false, // 默认不显示
        phone: '', // 手机号,
        countDownTime: 0,
        code: '',
        username: '',
        pwd: '',
        captcha: ''
      }
    },
    methods: {
      toggleCaptcha(){
        this.$refs.captcha.src = 'http://localhost:4000/captcha?time=' + Date.now()
      },
      async getCode(){
        // 重置倒计时的时间
        this.countDownTime = 5
        // 开启倒计时
        let intervalId = setInterval(() => {
          this.countDownTime--
          this.countDownTime === 0 && clearInterval(intervalId)
        }, 1000)

        // 发送请求请求后台给手机发送验证码
        let result = await this.$API.sendCode({phone: this.phone})
        console.log(result);
        if(result.code === 0){
          alert('短信已发送')
        }else {
          alert(result.msg)
        }
      },
      async login(){
        // 1. 前端验证
        let {isUserNameLogin, phone, code, username, pwd, captcha} = this
        let names = isUserNameLogin?['username', 'pwd', 'captcha']:['phone', 'code']
        const success = await this.$validator.validateAll(names) // 对所有表单项进行验证
        if(success){ // 前端验证成功
          // 2. 后端验证
          // 1) 收集表单相的数据
          // 2) 发送请求了
          // 判断用户登陆的方式
          let result
          if(isUserNameLogin){ // 用户名/密码登录
            result = await this.$API.loginWithUserName({username, pwd, captcha})
            if(result.code === 1){
              alert('请输入正确的用户名/密码/验证码')
              // 更换验证码
              this.toggleCaptcha()
              // 清空之前的验证码
              this.captcha = ''
            }
          }else { // 手机号/验证码登录
            result = await this.$API.loginWithPhone({phone, code})
            console.log('--------------------', result);
            if(result.code === 1){
              alert('请输入正确的验证码')
              this.code = ''
            }
          }

          // 统一处理登录的情况
          if(result.code === 0){
            // 登录成功
            // 跳转页面
            alert('登录成功')
            this.$router.replace('/profile')
            // 将用户数据保存至Vuex中
            this.$store.dispatch('getUserInfoAction', result.data)
          }
        }else {// 前端验证失败
          alert('前端验证失败')
        }

      },
      toggleLanguage(language){
        this.$i18n.locale = language

      }
    },
    computed: {
      rightPhoneNumber(){
        return /^1(3|4|5|6|7|8|9)\d{9}$/.test(this.phone)
      }
    },
    mounted(){
      this.$i18n.locale = 'Chinese'
    }
  }
</script>

<style lang="stylus" rel="stylesheet/stylus">
  .loginContainer
    width 100%
    height 100%
    background #fff
    .loginInner
      padding-top 60px
      width 80%
      margin 0 auto
      .login_header
        .login_logo
          font-size 40px
          font-weight bold
          color #02a774
          text-align center
        .login_header_title
          padding-top 40px
          text-align center
          >a
            color #333
            font-size 14px
            padding-bottom 4px
            &:first-child
              margin-right 40px
            &.on
              color #02a774
              font-weight 700
              border-bottom 2px solid #02a774
      .login_content
        >form
          >div
            display none
            &.on
              display block
            input
              width 100%
              height 100%
              padding-left 10px
              box-sizing border-box
              border 1px solid #ddd
              border-radius 4px
              outline 0
              font 400 14px Arial
              &:focus
                border 1px solid #02a774
            .login_message
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .get_verification
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                border 0
                color #ccc
                font-size 14px
                background transparent
                &.rightPhone
                  color #333
            .login_verification
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .switch_button
                font-size 12px
                border 1px solid #ddd
                border-radius 8px
                transition background-color .3s,border-color .3s
                padding 0 6px
                width 30px
                height 16px
                line-height 16px
                color #fff
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                &.off
                  background #fff
                  .switch_text
                    float right
                    color #ddd
                &.on
                  background #02a774
                >.switch_circle
                  // transform translateX(27px)
                  position absolute
                  top -1px
                  left -1px
                  width 16px
                  height 16px
                  border 1px solid #ddd
                  border-radius 50%
                  background #fff
                  box-shadow 0 2px 4px 0 rgba(0,0,0,.1)
                  transition transform .3s
                  &.right
                    transform translateX(27px)
            .login_hint
              margin-top 12px
              color #999
              font-size 14px
              line-height 20px
              >a
                color #02a774
          .login_submit
            display block
            width 100%
            height 42px
            margin-top 30px
            border-radius 4px
            background #4cd96f
            color #fff
            text-align center
            font-size 16px
            line-height 42px
            border 0
        .about_us
          display block
          font-size 12px
          margin-top 20px
          text-align center
          color #999
      .go_back
        position absolute
        top 5px
        left 5px
        width 30px
        height 30px
        >.iconfont
          font-size 20px
          color #999

    .languageContainer
      display flex
      margin-top 50px
      justify-content space-around
</style>
